DE10326588A1 - Guidable sledge for use by adults on snow, has skids that turn about their longitudinal axes when seat racks are inclined - Google Patents

Abstract

A seating arrangement that inclines according to the traversed slope is comprised of two parts, with one part arranged behind the other. Upper cross beams carry a seat. Skids are connected to stretcher posts of the seat racks and with the handgrips right and left of the seat. Inclining the seat racks causes the skids to turn about their longitudinal axes.

Description

Already known constructions

It There are already many technical concepts for steerable toboggans. The most common is the two rigid runners a third, um their vertical axis rotatable, added. Here steering leads inevitably to a significant reduction in speed.

In another, very interesting concept, 2 flexible runners are attached to 2 rotatable forks standing one behind the other, whose axis of rotation, as in the case of a two-wheeler, are inclined backwards by a few degrees (forward flow). By oppositely moving the two skids turn around their longitudinal axis and thus cause the cornering. To move the runners are in the middle 2 Hand grips and at the front runner ends 2 U-shaped brackets attached to hook the feet. Obvious disadvantages: 1. In order to shift the skids against each other, the driver must exert pressure on one of the tips of the skids with his feet. As a result, the bending of the skid is suppressed. So it can only be driven larger radii. 2. The twisting of the forks inevitably reduces the gauge. 3. According to this principle, probably only one-seater can be realized.

Other Solutions that have become known to me appeared either too complex or too specialized in use.

task

aim my design was a sled, with which also tight curves drive without major loss of speed let and change direction similar liquid run like skiing. In addition, the sled should (also by bigger children) easy to master, good to carry and also multi-seated. Furthermore, the sled should work equally well for different snow conditions suitable.

function Description

to Cornering, the driver tilts in the desired direction and leads the both handles in the same direction. This will be the Skids around their longitudinal axis twisted so that they ride on their inside bend. at the same time The seat is moved in the direction of the curve center and inclined. By this shift in emphasis reduces the load differential between the two skids. This is especially true for uphill bends attractively priced.

• 1. Die kurveninnere Kufe wird steiler angestellt, fährt also einen kleineren Radius als die äußere.
• 2. Der Sitz verschiebt und neigt sich in Richtung Kurvenmittelpunkt. So wird – wie beim Zweirad – der Fliehkraft entgegengewirkt.

The difference in length between the upper and lower crossbars when cornering (in contrast to the principle of parallelogram) two things:

• 1. The inside runner is steeper turned, so runs a smaller radius than the outer.
• 2. The seat shifts and tilts towards the center of the curve. Thus, the centrifugal force is counteracted - as in the two-wheeler.

Angle difference the runners and degree of seat tilt depend directly on the difference in length between upper and lower traverse.

The Handholds are located nearby the heavy line of the driver. This is a good cohesion between Driver and sports equipment given.

The Seat frame is built as short as the stability requirements still allow with it as possible greater Share of skids unloaded and thus remains flexible. This and the to the ends sloping material thickness of the skids to the bending of the When cornering, bring skids closer to the ideal circular arc.

The lower trusses of the seat frame are shaped as a bracket. That's enough Distance to the snow surface. At the same time they serve to limit the deflection angle. maximum Deflection is achieved when upper and lower trusses together bump.

is The carriage design designed for extreme tilt, it could require some strength and skill, from a keenly driven Curve to return to straight ahead position. It is advisable So to make the maximum deflection angle adjustable. This let yourself easily e.g. reach through a set screw, which at the top Traverse sits and serves as a stop. Self-centering by means of Tension spring appears dispensable with sufficient runner width.

decelerated becomes more leisurely Ride with your feet, at sporty drive through crossways in sharp swing.

Claims (1)

Patent protection is requested for the geometric principle of the seat frame: a trapeze with the long side at the top and one joint at each corner. Two parts built according to this principle, standing one behind the other, form the seat frame, which can be tilted transversely to the track. The upper trusses carry the seat. The skids are firmly connected to the support posts of the seat frame, as well as the handles on the left and right of the seat. When inclining the seat frame, the runners rotate about their longitudinal axes. The skids are built like skis, so around their transverse axis flexible.